Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 10 Counting Methods and Probability - 10.3 Define and Use Probability - 10.3 Exercises - Skill Practice - Page 702: 18



Work Step by Step

We know that if we want to select $r$ objects out of $n$ regarding the order, we can do this in $_nP_r=\frac{n!}{(n-r)!}$ ways. Here we have $n=10$ and $r=4$; hence we have $_{10}P_4=5040$ total possible selections: $\frac{1}{5040}$
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